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Transitioning to Flame from the USB Series
Transitioning to Flame from the USB Series

Measurement Techniques
Measurement Techniques

... measurements should be limited to the range of low ambient temperatures, or a temperature control of the diode (e.g., using a Peltier cooler) should be applied. At high temperatures, dark current is increased (see figure 18) leading to a non-logarithmic and temperature dependent output characteristi ...
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... Fairchild Semiconductor Corporation's Anti-Counterfeiting Policy. Fairchild's Anti-Counterfeiting Policy is also stated on our external website, www.fairchildsemi.com, under Sales Support. Counterfeiting of semiconductor parts is a growing problem in the industry. All manufacturers of semiconductor ...
VoltageLimiter
VoltageLimiter

... Hybrid was connected to LV3 power supply using a set of cables as close as possible to the situation in the ATLAS detector. Voltage limiter was positioned at the PP3 as will be the case in ATLAS. Setup:  hybrid to PPB1: thin (50 μm Al) LM tape, 3 m long  PPB1 to PP2: 9 m of very thin conventional ...
ADN4666 数据手册DataSheet 下载
ADN4666 数据手册DataSheet 下载

... Receiver Channel 1 Noninverting Input. When this input is more positive than RIN1−, ROUT1 is high. When this input is more negative than RIN1−, ROUT1 is low. Receiver Channel 1 Output (3 V TTL/CMOS). If the differential input voltage between RIN1+ and RIN1− is positive, this output is high. If the d ...
OPA843 Wideband, Low Distortion, Medium Gain, Voltage-Feedback OPERATIONAL AMPLIFIER DESCRIPTION
OPA843 Wideband, Low Distortion, Medium Gain, Voltage-Feedback OPERATIONAL AMPLIFIER DESCRIPTION

... The OPA843’s combination of speed and dynamic range is useful in a wide variety of application circuits, as long as simple guidelines common to all high-speed amplifiers are observed. For example, good power-supply decoupling, as shown in Figure 1, is essential to achieve the lowest possible harmoni ...
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... a prime mover or a mechanical load. By controlling the field excitation, it can be made to either generate or absorb reactive power. They can automatically adjust the reactive power output to maintain constant terminal voltage with a voltage regulator. Static var compensators are shunt-connected sta ...
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View - The IJST
View - The IJST

... The phase back EMF voltage is referred to neutral point of the motor. Since the center point of the motor is typically not available, the commonly used method reconstructs the neutral voltage information. Figure 2 shows the detection circuit based on motor virtual neutral voltage. Voltage dividers a ...
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13 DelcoXSVolt

... can increase certain electrical component performance, but excessively high voltage can be damaging. Refer to the component owner’s manual or contact the manufacturer to determine the maximum voltage for safe operation of all aftermarket electrical components. For all original equipment components, ...
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MAX16813 Evaluation Kit Evaluates: MAX16813 General Description Features

... followed by 4 channels of linear current sinks. The preregulator switches at 350kHz and operates as a currentmode-controlled regulator providing up to 600mA for the linear circuit while providing OVP. Cycle-by-cycle current limit is set by resistor R4 while resistors R6 and R7 set the OVP voltage to ...
For more information call: APC Corporate APC North America APC
For more information call: APC Corporate APC North America APC

NCP1403 15 V/50 mA PFM Step-Up DC-DC Converter
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... Howsoever complicated an electronic circuit may look, but luckily it contains only a few types of basic components—some active and some passive. Components such as PN-junction diodes, transistors, SCRs, FETs, etc. are said to be active because these are capable of changing the shape of electrical si ...
SBS 1.1-COMPLIANT GAS GAUGE ENABLED
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... its output logic state can be indeterminate when the differential input voltage is between –100 mV and 100 mV and within its recommended input common-mode voltage range. However, TI's LVDS receiver is different in how it handles the open-input circuit situation. Open-circuit means that there is litt ...
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"harmonic vibrato"?
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AD694 - Analog Devices

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Digital Systems: Combinational Logic Circuits

... (a) IC input internally shorted to ground; (b) IC input internally shorted to supply voltage. These two types of failures force the input signal at the shorted pin to stay in the same state. (c) IC output internally shorted to ground; (d) output internally shorted to supply voltage. These two failur ...
design and development of an ultrasonic motion detector
design and development of an ultrasonic motion detector

time domain analysis of induction motor starting transients
time domain analysis of induction motor starting transients

... The larger capacitor is present in the circuit only during starting when it ensures that the currents in the main and auxiliary windings are roughly balanced, yielding a relatively high starting torque. When the motor runs up to speed, the centrifugal switch opens, and the permanent capacitor is lef ...
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Analog Floating-Gate, On-Chip Auditory Sensing System Interfaces

... Fig. 2. Guidelines on using ASP or DSP depending upon required resolution (signal-to-noise). (a) As discussed elsewhere [2], the computation cost of digital computation varies linearly with the required bits of resolution, while the computation cost of digital computation varies exponentially with t ...
Transistor Introduction, Simulation and optional
Transistor Introduction, Simulation and optional

... One way to consider the operation of a transistor is to think of it as an electrically controlled switch or valve that can be gradually enabled to allow continuously more current through the switch until it is completely conducting. For our purposes, we will consider current flowing into the collect ...
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Pulse-width modulation



Pulse-width modulation (PWM), or pulse-duration modulation (PDM), is a modulation technique used to encode a message into a pulsing signal. Although this modulation technique can be used to encode information for transmission, its main use is to allow the control of the power supplied to electrical devices, especially to inertial loads such as motors. In addition, PWM is one of the two principal algorithms used in photovoltaic solar battery chargers, the other being MPPT.The average value of voltage (and current) fed to the load is controlled by turning the switch between supply and load on and off at a fast rate. The longer the switch is on compared to the off periods, the higher the total power supplied to the load.The PWM switching frequency has to be much higher than what would affect the load (the device that uses the power), which is to say that the resultant waveform perceived by the load must be as smooth as possible. Typically switching has to be done several times a minute in an electric stove, 120 Hz in a lamp dimmer, from few kilohertz (kHz) to tens of kHz for a motor drive and well into the tens or hundreds of kHz in audio amplifiers and computer power supplies.The term duty cycle describes the proportion of 'on' time to the regular interval or 'period' of time; a low duty cycle corresponds to low power, because the power is off for most of the time. Duty cycle is expressed in percent, 100% being fully on.The main advantage of PWM is that power loss in the switching devices is very low. When a switch is off there is practically no current, and when it is on and power is being transferred to the load, there is almost no voltage drop across the switch. Power loss, being the product of voltage and current, is thus in both cases close to zero. PWM also works well with digital controls, which, because of their on/off nature, can easily set the needed duty cycle.PWM has also been used in certain communication systems where its duty cycle has been used to convey information over a communications channel.
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